2001A&A...367..470G


Query : 2001A&A...367..470G

2001A&A...367..470G - Astronomy and Astrophysics, volume 367, 470-486 (2001/2-4)

X-ray variability in a complete sample of soft X-ray selected AGN.

GRUPE D., THOMAS H.-C. and BEUERMANN K.

Abstract (from CDS):

We present ROSAT All-Sky Survey and ROSAT pointed observations (PSPC and HRI) of a complete sample of 113 bright soft X-ray AGN selected from the ROSAT Bright Source Catalog. We compare these observations in order to search for extreme cases of flux and spectral X-ray variability - X-ray transient AGN. Three definite transients and one transient candidate are found. The other sources show amplitude variations typically by factors of 2-3 on timescales of years. We found that the variability strength on timescales of days is a function of the steepness of the X-ray spectrum: steeper X-ray objects show stronger variability than flat X-ray spectrum sources. We also present new HRI measurements of our extreme X-ray transients IC 3599 and WPVS 007. We discuss possible models to explain the X-ray transience and the variabilities observed in the non-transient sources.

Abstract Copyright:

Journal keyword(s): accretion, accretion disks - galaxies: active - galaxies: nuclei of - galaxies: Seyfert - quasars: general

CDS comments: misprint 1H 0419+577 instead of 1H 0419-577

Simbad objects: 118

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Number of rows : 118
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 Mrk 335 Sy1 00 06 19.5372339024 +20 12 10.617404076   14.19 13.85     ~ 1180 0
2 ESO 242-8 Sy1 00 25 01.2581532096 -45 29 54.659092992   15.82 15.75 15.40   ~ 23 0
3 LEDA 87392 Sy1 00 39 15.8339634552 -51 17 01.481641692   15.77 15.28 15.66   ~ 125 0
4 Ton S 180 Sy1 00 57 20.2040816832 -22 22 56.575212564   14.60 14.34 15.23   ~ 283 0
5 LEDA 87814 Sy1 00 58 37.3829486184 -36 06 04.948761240   14.9 14.90 15.0   ~ 84 0
6 LEDA 3095485 Sy1 01 00 27.0977041272 -51 13 54.099800868   16.48 15.4 15.17   ~ 47 0
7 ATO J016.4116-14.2704 Sy1 01 05 38.7922729728 -14 16 13.575881712   13.6 15.51 15.17 14.43 ~ 34 1
8 2MASS J01173065-3826297 Sy1 01 17 30.6533974440 -38 26 29.721174936   18.26 16.5 17.25   ~ 18 0
9 2MASS J01193569-2821314 Sy1 01 19 35.6924750256 -28 21 31.423369428   18.13 16.3 16.58   ~ 52 0
10 MCG-03-04-072 Sy1 01 28 06.7200878472 -18 48 31.059009792   15 15.5     ~ 31 0
11 2MASX J01291051-2141572 Sy1 01 29 10.6819 -21 41 56.999   13.5 15.4 12.7   ~ 22 0
12 2MASS J01341690-4258262 Sy1 01 34 16.9072341600 -42 58 26.223391344   18.17 17.30 16.71   ~ 69 0
13 2MASS J01395577+0619225 Sy1 01 39 55.7697705024 +06 19 22.520805888   16.80 17.00     ~ 165 0
14 2MASS J01482232-2758257 Sy1 01 48 22.3291756272 -27 58 25.628356056   17.72 15.0 16.37   ~ 29 0
15 RX J0152.4-2319 Sy1 01 52 27.0845373120 -23 19 53.614297992   17.39 15.6 16.18   ~ 25 0
16 Mrk 1044 Sy1 02 30 05.5225590096 -08 59 53.207139372   14.74 14.29 13.981 13.585 ~ 251 0
17 NGC 985 Sy1 02 34 37.882 -08 47 17.02   14.64 14.28 12.9   ~ 378 0
18 RX J0311.3-2046 Sy1 03 11 18.8105331600 -20 46 18.137182728   16.97 16.47 15.82   ~ 34 0
19 LEDA 767650 Sy1 03 19 48.5587896024 -26 27 12.764497968   12.5 15.9 12.3   ~ 24 0
20 LEDA 476029 Sy1 03 23 15.2955207864 -49 31 06.106276164   16.62 16.5 15.57   ~ 36 0
21 FRL 1106 Sy1 03 25 02.2747037736 -41 54 17.618382936   15.37 15.43 15.20   ~ 29 1
22 LEDA 13176 Sy1 03 33 40.1724138768 -37 06 54.215420040   15.5 16.1 15.4   ~ 22 0
23 2MASS J03490770-4711041 Sy1 03 49 07.7094699864 -47 11 04.117135560   18.29 16.8 17.01   ~ 14 0
24 FRL 1116 Sy1 03 51 41.6988393408 -40 27 59.269106916   15.10 14.67 12.1   ~ 64 0
25 ESO 359-19 Sy1 04 05 01.6841808552 -37 11 15.061344360   15.24   14.96   ~ 38 0
26 2MASS J04124148-4712461 Sy1 04 12 41.4857875224 -47 12 46.018635156 14.96 15.78 15.42     ~ 16 0
27 LB 1727 Sy1 04 26 00.7188165240 -57 12 01.769902992 13.68 14.58 14.37 14.8   ~ 252 0
28 FRL 303 Sy1 04 30 40.0329717936 -53 36 55.640614860 15.90 16.00 15.6 12.4   ~ 47 0
29 LEDA 3095692 Sy1 04 37 28.1562436872 -47 11 29.481984132 14.68 16.61 14.95 15.43   ~ 73 0
30 [VV98] J043938.7-531131 Sy1 04 39 38.7161600856 -53 11 31.242561864     16.2     ~ 44 0
31 LEDA 3095695 Sy1 04 41 22.5335616264 -27 08 19.330430640 15.48 16.09 15.32 14.6   ~ 51 0
32 [VV2006] J061549.7-582605 QSO 06 15 49.5806236080 -58 26 05.247511116   16.93   15.85   ~ 17 0
33 ATO J134.7620+48.7692 Sy1 08 59 02.8979138088 +48 46 09.344365284   15.49 15.31     ~ 20 0
34 LEDA 3095849 AGN 09 02 33.5677484736 -07 00 04.320176004   17.70   16.72   ~ 17 0
35 Mrk 110 Sy1 09 25 12.8479065576 +52 17 10.386311208   16.82 16.41     ~ 552 0
36 PG 0953+414 Sy1 09 56 52.3931554992 +41 15 22.211247636 14.710 15.611 15.546 15.294 14.720 ~ 434 0
37 2MASS J10054187+4332404 Sy1 10 05 41.8619625936 +43 32 40.448664672   17.09 16.89     ~ 78 0
38 [VV2006c] J100710.2+220302 Sy1 10 07 10.13 +22 03 14.6     17.0     ~ 17 0
39 Ton 1187 Sy1 10 13 03.1814662440 +35 51 23.742391536   15.60 15.42     ~ 85 0
40 LEDA 2111896 Sy1 10 19 00.4582268064 +37 52 40.546554852   18.84 18.31     ~ 25 0
41 Mrk 141 Sy1 10 19 12.5653238136 +63 58 02.626090176   16.32 16.00     ~ 140 0
42 Mrk 142 Sy1 10 25 31.2786898344 +51 40 34.867889004   16.33 16.12     ~ 259 0
43 Z 212-25 Sy1 10 34 38.5982990352 +39 38 28.187042604   17.37 16.90     ~ 332 1
44 2MASS J11171007+6522073 Sy1 11 17 10.0677331056 +65 22 07.230282924   16.8 16.4     ~ 26 0
45 LEDA 34570 Sy1 11 18 30.2894794680 +40 25 54.068810952   16.34 16.21     ~ 208 0
46 Ton 1388 Sy1 11 19 08.6786220240 +21 19 17.987085948   14.91 14.80     ~ 440 0
47 2MASX J11310476+6851528 Sy1 11 31 04.7642631360 +68 51 52.996272264   16.17 15.27     ~ 31 0
48 Ton 580 Sy1 11 31 09.4824534600 +31 14 05.506804464   16.22 16.05 15.8   ~ 140 1
49 LEDA 36083 Sy1 11 38 49.6022320320 +57 42 43.527436452   18.07 17.75     ~ 40 0
50 Z 186-18 Sy1 11 39 13.9165085280 +33 55 51.148246188   17.38 16.98     ~ 87 0
51 ATO J175.3173+21.9393 Sy1 11 41 16.1619388704 +21 56 21.657948900   16.94 16.81     ~ 69 0
52 2MASX J11442989+3653085 Sy1 11 44 29.8707689808 +36 53 08.616327396   16.26 15.49     ~ 71 0
53 Ton 1460 HS* 11 53 58.8150712224 +35 39 29.109198096   16.27       sdB 17 0
54 Mrk 1310 Sy1 12 01 14.3530384560 -03 40 41.015051940   16.31 15.89 14.780   ~ 165 0
55 NGC 4051 Sy1 12 03 09.6101337312 +44 31 52.682601288   11.08 12.92 9.94   ~ 2084 1
56 LEDA 38224 Sy1 12 04 42.1097215992 +27 54 11.869350264   15.64 15.60     ~ 368 0
57 LEDA 3096099 Sy1 12 09 45.2139629160 +32 17 01.101574284   17.80 17.58     ~ 47 0
58 PB 3894 Sy1 12 14 17.6738687784 +14 03 13.182723144   14.46 14.19     ~ 777 0
59 NGC 4253 Sy1 12 18 26.5163572920 +29 48 46.531535472   14.34 13.57     ~ 986 1
60 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 5584 1
61 2MASS J12313656+7044144 Sy1 12 31 36.5590509432 +70 44 14.352161820     15.66     ~ 45 0
62 Mrk 771 Sy1 12 32 03.6223710000 +20 09 29.495834136   15.57 15.30     ~ 465 0
63 MCG+08-23-067 Sy1 12 36 51.1771780656 +45 39 04.167368784   17.64 17.16     ~ 64 0
64 IC 3599 Sy1 12 37 41.1939398400 +26 42 27.484266888   15.7 16.5     ~ 164 0
65 NGC 4593 Sy1 12 39 39.4435107024 -05 20 39.034988448   13.95 13.15     ~ 1018 0
66 LEDA 42648 Sy1 12 42 10.6050409800 +33 17 02.662913436   16.45 15.65     ~ 108 0
67 LBQS 1244+0238 Sy1 12 46 35.2527826632 +02 22 08.782546368   16.57 16.37     ~ 272 0
68 2MASS J13041699+0205369 Sy1 13 04 16.9956509664 +02 05 37.011845868   17.71 17.43     ~ 47 0
69 LEDA 45656 Sy1 13 09 47.0031619008 +08 19 48.212362524   16.04 15.89     ~ 366 0
70 Ton 1571 Sy1 13 14 22.6994312544 +34 29 38.491405224   16.93 16.74     ~ 27 0
71 LEDA 3096247 Sy1 13 19 57.0706040640 +52 35 33.711803016   18.40 17.94     ~ 33 0
72 2MASS J13234951+6541480 Sy1 13 23 49.5182430360 +65 41 48.164463600   16.01 15.84     ~ 159 0
73 LEDA 88835 Sy1 13 25 19.3805530608 -38 24 52.611680340   16.64 13.80 15.33   ~ 382 0
74 LEDA 101275 Sy1 13 37 18.7199358192 +24 23 03.319883484     15.0     ~ 374 0
75 Ton 730 Sy1 13 43 56.7435190440 +25 38 47.638868604   16.48 16.6     ~ 113 0
76 LEDA 2816068 Sy1 13 55 16.5544257624 +56 12 44.628164604   17.38 17.09     ~ 71 0
77 Ton 182 Sy1 14 05 16.2178674936 +25 55 34.117540788   15.42 15.34     ~ 236 0
78 LEDA 2736483 Sy1 14 13 36.7134126624 +70 29 50.459589312     16.9     ~ 18 0
79 NGC 5548 Sy1 14 17 59.5400291832 +25 08 12.603122268   14.35 13.73     ~ 2546 0
80 QSO B1421-0013 QSO 14 24 03.8064113976 -00 26 58.009160652   16.49 16.16     ~ 21 0
81 Mrk 813 Sy1 14 27 25.0494383208 +19 49 52.268736936   15.42 15.27     ~ 77 0
82 Mrk 684 Sy1 14 31 04.7823008520 +28 17 14.127735336   15.36 14.68     ~ 96 0
83 Mrk 478 Sy1 14 42 07.4714418744 +35 26 22.938625500   14.91 14.58     ~ 511 0
84 2MASX J14510879+2709272 Sy1 14 51 08.7647938560 +27 09 26.962707132   15.01 15.01     ~ 186 0
85 Mrk 841 Sy1 15 04 01.1935384104 +10 26 15.780409692   14.50 14.27     ~ 613 0
86 LEDA 2531253 Sy1 15 29 07.4560860072 +56 16 06.729661596   16.90 16.74     ~ 42 0
87 Mrk 493 Sy1 15 59 09.6231720696 +35 01 47.561352852   15.69 15.06     ~ 293 0
88 Mrk 876 Sy1 16 13 57.1795021224 +65 43 09.952685328   16.03 15.49     ~ 541 0
89 2MASX J16175244+0604180 Sy1 16 17 52.4301748560 +06 04 18.209230284   15.66 15.7     ~ 60 0
90 2MASX J16180940+3619580 Sy1 16 18 09.3737457456 +36 19 57.871902108   17.63 17.09     ~ 40 0
91 2MASX J16195129+4058472 Sy1 16 19 51.3112866864 +40 58 47.331025212   17.81 17.34     ~ 60 0
92 2MASX J16245665+7554560 BLL 16 24 56.5716973728 +75 54 55.975695048     16.60     ~ 52 0
93 QSO B1626+5529 Sy1 16 27 56.1123628752 +55 22 31.559061504   15.79 15.68     ~ 198 0
94 2MASS J16290130+4007599 Sy1 16 29 01.3106358000 +40 07 59.905936776   18.23 18.00 17.2   ~ 104 0
95 2MASS J17023106+3247196 Sy1 17 02 31.0621362912 +32 47 19.645937088   16.19 15.98     ~ 66 0
96 Mrk 1513 Sy1 21 32 27.8162556672 +10 08 19.252365396   14.92 14.64     ~ 570 0
97 LEDA 198513 Sy1 21 46 36.0638690352 -30 51 40.495929696   17.084   16.959   ~ 20 0
98 ESO 404-29 Sy1 22 07 45.0231749376 -32 35 01.584034836   15.52 15.32 15.18   ~ 25 0
99 NGC 7214 Sy1 22 09 07.6631604816 -27 48 34.160960772   12.48 14.10 11.40   ~ 128 0
100 RX J2216.9-4451 Sy1 22 16 53.2186415472 -44 51 56.950820316   17.80 15.8 16.25   ~ 26 1
101 2MASS J22175666-5941309 Sy1 22 17 56.6565733944 -59 41 30.813696852 16.30 17.08 16.78 16.80   ~ 41 0
102 QSO B2227-399 QSO 22 30 40.2789257160 -39 42 52.066612080   17.87 18.5 15.73   ~ 92 1
103 2MASS J22423769-3845162 Sy1 22 42 37.6891808688 -38 45 16.294895352   18.50 16.9 17.05   ~ 18 0
104 IRAS F22423-4707 Sy1 22 45 20.3013536736 -46 52 11.619968160   17.02 14.8 15.88   ~ 38 0
105 2MASS J22484115-5109532 Sy1 22 48 41.1707472480 -51 09 53.322381180   15.60 15.43 15.5   ~ 66 0
106 LEDA 3096712 Sy1 22 57 39.0250746096 -36 56 06.528333048   16.59 16.0 15.64   ~ 65 0
107 LEDA 3096713 Sy1 22 58 45.3700820832 -26 09 14.181908868   17.31 16.1 16.14   ~ 18 0
108 LEDA 373076 Sy1 23 01 36.2307364560 -59 13 21.082167768   17.88   16.20   ~ 28 0
109 2MASS J23015199-5508308 Sy1 23 01 52.0213292088 -55 08 30.862357476   17.24 15.4 16.08   ~ 27 0
110 2dFGRS TGS538Z275 Sy1 23 04 37.4064839376 -35 01 13.606851468   16.755 16.6 15.558   ~ 15 0
111 2MASS J23123476-3404202 Sy1 23 12 34.7715351000 -34 04 20.167564512   17.95 17.20 16.73   ~ 18 1
112 LEDA 3096727 Sy1 23 17 49.9494999096 -44 22 27.804075348   17.96 16.8 16.84   ~ 21 0
113 2MASS J23251179-3236346 Sy1 23 25 11.7930406176 -32 36 34.545128220   18.12 17.0 17.02   ~ 17 1
114 2MASX J23252420-3826492 Sy1 23 25 24.1886501280 -38 26 49.177796028   14.84 14.24     ~ 56 0
115 LEDA 141129 Sy1 23 43 28.5432790776 -14 55 30.604095552   17.45 15.91 16.50   ~ 38 0
116 LEDA 705208 Sy1 23 49 24.0315 -31 26 02.559   16.864 16.6 15.687   ~ 21 0
117 MCG-05-01-012 PaG 23 57 26.7 -30 27 33   15.12       ~ 23 0
118 MCG-05-01-013 Sy1 23 57 28.0469236872 -30 27 40.510423404   10.7 11.27 10.2   ~ 24 0

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2022.08.10-07:06:29

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